Film-feeding device



July 6,1926. 1,591,763I

J. HAPPACHER FILM FEEDING DEV-Ien Filed oct. a, 1924 2 sheets-sheet 1 Patented July 6, 1926.

UNITED STATES PATENT OFFICE.

-TosEPH HAPPACHEE, oE EssEN, GERMANY, AssIGNoE To EEIED. KEUPP AKTIEN- GESELLSCHAFT, oF EssEN-oNTHE-RUHE. GERMANY.

FILM-FEEDING DEVICE.

Application' ined october s, 1924, serial No.

This invention relates to filmfeedingdevices of the kind-comprising a picture .adjusting mechanism and resides in, an 1mproved construction and combination of parts lof such devices as will be more fully understood from the following description and the accompanying drawings.

As an embodiment of the subject-matter of the invention, a moving picture projection machine is illustrated in the drawings in which:

Fig. 1 is a vertical section through the projection machine;

Fig. 2 is a section along the line 2-2 of. Fig. l, seen from the left;

Fig. 3 is a section along the line 3 3 of Fig.' 1, seen from above;

Fig. 4 is a detail, partly in section, on an enlarged scale and Fig. 5 is a detail of Fig. 3, likewise on an enlar ed scale.

Re erring now to the drawing, A desig-` nates the casing of the projectionmachine which is closed at all sides and in which is mounted the driving shaft B on which are fastened a rope pulley b1 and a double wheel b?, b3, see particularly Figs. 2 and 3. The pulley b1 is in connection with the driving motor, not shown. The wheel b2 is a screw wheeland meshes with another screw wheel c1 which is carried by an upright shaf t C mounted in the casing A. Through the intermediary of pairs of gear Wheels el (I1, c el and c1 f1 the shaft C imparts rotation to the shutter D which is mounted on the shaft d2, as well as to the film winding drums E and F which are mounted on the shafts c2 and f2. The shafts d2, e2 and f2 are mounted for rotation in the casing A. The wheel b3 of the double wheel b2 b3 is constructed as a spur gear and meshes with a spur wheel G the teeth of which are much broader thanthose of the spur Wheel b3 and which is rigidly connected with a sleeve G1. The sleeve G1 is, bothrotatable and shift-- able on a shaft'H. The shaft H is mounted eccentrically in a rotary body member J which is rockablearound the axis of the shaft B. It has a portion of a screw thread h1 which is in engagement with a-corresponding groove g2 of the sleeve G1. The sleeve G1 is surrounded by a sleeve K which is shiftable in a cylindrical guide il of the rotary body member J but held against ro- 742,451, and in Germany January 122, 1924.

tation b y a pin '2 which is fixed to the guide l andv 1n engagement with an axial longi- The above dercribed construction of the machine is well-known, However, the machine is moreover provided with a manually actuated driving mechanism and a picture adjusting mechanism the drivingshafts of which are co-axial. iRotatably mounted in the casing A is a hollow shaft N which is adapted to be coupled by means of a clutch nl, p2 with a co-axial hollow shaft P which is provided with a hand crank p1. The

shaft N carries a spur wheel n2 meshing with a spur wheel Q which is freely rotatable on the lshaft f2. The spur wheel Q. is connected with the bevel wheel f1 by a friction coupling g1 S f3 which is operative only in one sense of rotation. N rotatably receives alsolid shaft R which carries at its free end a pinion r1 which is -in/ engagement with a toothed are of the rotary body member J. The shaft l is provided at its other end with two teeth which are adapted to engage two notches p3 of the hollow shaft P when same is correspondingly shifted.

During the normal working the following operation takes place.

The shaftB driven through the rope pulley bl imparts rotation by the intermedarv of the spur wheel ba'to the spuit` wheel G with the sleeve G, to the shaft H which is coupled with the sleeve G1 by the elements q2 h1, and to the single tooth wheel k2. -The single tooth wheel h2 imparts intermittent motion to the Maltese cross m1 and the feed drum M. On the other hand, the rotation of the shaft B is transmitted through the screw Wheel gearing b2 c1 to the upright The hollow sha-ft shaft C which drives the film Winding drums i i adjacent faces and therefore are prevented from imparting rotation to the spur wheel Q.

If, for any reason, it should become necessary to operate tlie machine by means of the manually actuated driving mechanism, the hand crank p1 is rotated clockwise when in the position according to the drawing in which it is coupled by the clutch p2 nl with the hollow shaft N. This rotation of the hand crank p1 is transmitted by the spur wheel n? to the idle spur wheel Q of the shaft f2 in a sense to cause the wheel Q, to rotate in counter-clockwise direction. During this rotation the halls fi are pressed against the inner face of the bevel wheel f1 imparting rotation to the same. The upright shaft C and the drivingr shaft B which is connected with theshaft C by the screw wheel gearing c1 b2, take part in the rotation of the bevel wheel f1 so that the film feed drum M as well as the winding drums E and F and the shutter D are rotated in the manner already described above.

If a wrong ad 'ustn'\ent ot' the picture occurs during the working and it becomes necessaryto alter the picture adjustment, the hollow shaft P is shifted axially in the direction of the arrow y, Figs. 3 and 5, by pulling at the hand crank 771 so that the clutch 'nl p2 is released and the clutch w r2 thrown in. Thereupon the hand cranky?1 and the solidshaft which is now coupled` with the crank` are rotated. The rotation of the crank p1 is transmitted by the toothed gearing r1 i to the rotary body member J which is rocked together with the guidingcylinder il around the axis of the shaft B. This rocking movement of the rotary member J will cause the toothed wheel AGr to be shifted longitudinally 'by the cooperation of the parts a1 c. Through the action of the thread portion 71.1 the toothed wheel G is at the same time rotated with relation to the shaft H and the single tooth wheel h2 by the same angle by which the rotary member 'J is being rocked. The rockingvof the rotary body member J therefore causes an in-l creasedor decreased speed to be imparted to the toothed wheel G in a measure so thatl the shaft H, the single tooth wheel h and the vshutter D rotate always at the same speed. Besides, the rocking ofthe member J causes a variation of the initial position of the Maltesecross m1, the same being va'- ried by the angle of rocking of the. memberv mechanism including a hollow driving shaft for the normal feeding of the film, a driwT` ing ,shaft for the picture adjusting mechanism, this shaft being arranged concentrically with relation to the first said driving shaft, and a common actuating member for both shafts'.

2. In a film feeding apparatus comprising a picture adjusting mechanism including a driving` shaft. a driving mechanism for the normal feeding of the film including also a driving shaft, the two driving shafts being arranged co-axially with relation to each other, and an actuating member adapted to be selectively coupled with said shafts- 3. In a film feeding apparatus comprising a picture adjusting mechanism including a during shaft.. a driving mechanism for the normal feeding of the film`including also a driving shaft, the two driving shafts being arranged co-axially with relation to each other, and an actuating member for said shafts, said actuating member being mounted for rotation and adapted to be shifted axially into` two coupling positions, means for coupling the actuating member in onel of the said positions with one of the driving shafts and means for coupling it in the other position with the other driving shaft.

The foregoing specification signed at lssen, Germany, this 9th day of September, 1924.'

JOSEPH HAPlACHER. 

